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通过对桩板墙挡土板的受力变形特征分析,指出桩间采用柔性挡土板时,作用于挡土板上的土压力相对较小。在对比分析拟化简仓法与卸荷拱法的基础上,针对当前挡土板土压力计算中存在的问题,对柔性板桩板墙加固斜坡填方地基展开试验研究,并重点研究桩前、桩后施工挡土板时墙后土压力的分布规律。通过对布置在挡土板上的位移计及预埋的土压力计进行监测,结果表明,挡土板布置在桩前时其挠曲变形及承受的土压力值较小,且桩间土拱效应更易得到发挥。挡土板上土压力自上而下多呈抛物线型分布,而作用于桩背侧的土压力分布相对复杂。通过对桩后布置挡土板的土压力分布规律进行为期21 d的监测,研究了土压力变化的时间效应。
Through the analysis of the stress and deformation characteristics of the retaining wall of the pile wall, it is pointed out that when the flexible retaining plate is adopted between piles, the earth pressure acting on the retaining plate is relatively small. Based on the comparative analysis of the simplified method and the unloading arch method, aiming at the problems in the current earth pressure calculation of the earth slab, , After the construction of the post-pile wall earth pressure distribution law. By monitoring the displacements of buried earth pressure gauges and the displacement meters arranged on the retaining plate, the results show that when the retaining plate is placed in front of the pile, the deflection and the earth pressure to be borne by the retaining plate are small, The effect is easier to play. Earth pressure on the soil from top to bottom mostly parabolic distribution, and the role of soil pressure distribution in the pile back is relatively complicated. Through the 21 d monitoring of the earth pressure distribution law of the retaining plate after the pile is piled up, the time effect of the earth pressure change is studied.